<div class="btn-group" style="cursor: move;margin: 3px 3px;">
    <button type="button" class="btn btn-sm" title="{{param.title}}" ng-class="{true:'btn-primary',false:'btn-default'}[param.values.length>0]">
        {{param.name}}
    </button>
    <button type="button" class="btn btn-sm dropdown-toggle" ng-class="{true:'btn-primary',false:'btn-default'}[param.values.length>0]"
            ng-click="editParam()">
        <span class="fa fa-edit"></span>
    </button>
</div>